Exciton migration and cathode quenching in organic light emitting diodes

被引：95
作者：
Burin, AL
Ratner, MA
机构：
[1] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA
[2] Northwestern Univ, Ctr Mat Res, Evanston, IL 60208 USA
来源：
JOURNAL OF PHYSICAL CHEMISTRY A | 2000年 / 104卷 / 20期
关键词：
D O I：
10.1021/jp994162x
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The quantum efficiency of organic light emitting devices depends on the exciton emission efficiency. Exciton quenching at the metal cathode can be responsible for lowering the device performance. We consider exciton quenching by the metal cathode, taking into account both exciton diffusion and radiationless energy transfer to the metal. The quenching effect in tris(8-hydroxyquinoline)aluminum is analyzed, and ways to improve the device efficiency by suppressing the interaction with the electrode are discussed.
引用
收藏
页码：4704 / 4710
页数：7
相关论文
共 32 条
[1]  
Auzel F., 1973, PHYS REV B, V6, P4370
[2]   Very high-efficiency green organic light-emitting devices based on electrophosphorescence [J].
Baldo, MA ;
Lamansky, S ;
Burrows, PE ;
Thompson, ME ;
Forrest, SR .
APPLIED PHYSICS LETTERS, 1999, 75 (01) :4-6
[3]   Models of organic light-emitting diodes [J].
Bassler, H ;
Tak, YH ;
Khramtchenkov, DV ;
Nikitenko, VR .
SYNTHETIC METALS, 1997, 91 (1-3) :173-179
[4]   Electronic dielectric constants of insulators calculated by the polarization method [J].
Bernardini, F ;
Fiorentini, V .
PHYSICAL REVIEW B, 1998, 58 (23) :15292-15295
[5]  
BOER KW, 1990, SURVEY SEMICONDUCTOR
[6]  
Burin A. I., 1995, Journal of Experimental and Theoretical Physics, V80, P568
[7]   Spin effects on the luminescence yield of organic light emitting diodes [J].
Burin, AL ;
Ratner, MA .
JOURNAL OF CHEMICAL PHYSICS, 1998, 109 (14) :6092-6102
[8]   COMMENTS ON CLASSICAL THEORY OF ENERGY-TRANSFER [J].
CHANCE, RR ;
PROCK, A ;
SILBEY, R .
JOURNAL OF CHEMICAL PHYSICS, 1975, 62 (06) :2245-2253
[9]   Effects of Al, Ag, and Ca on luminescence of organic materials [J].
Choong, VE ;
Park, Y ;
Gao, Y ;
Wehrmeister, T ;
Mullen, K ;
Hsieh, BR ;
Tang, CW .
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A, 1997, 15 (03) :1745-1749
[10]   Photoluminescence quenching of Alq3 by metal deposition:: A surface analytical investigation [J].
Choong, VE ;
Park, Y ;
Gao, Y ;
Mason, MG ;
Tang, CW .
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1998, 16 (03) :1838-1841
1234